| Upminster to Sinop | 1,756.79 mi (2,827.28 km) |
| Upminster to Siran | 1,999.06 mi (3,217.18 km) |
| Upminster to Sirnak | 2,253.70 mi (3,626.99 km) |
| Upminster to Sirvan | 2,211.79 mi (3,559.54 km) |
| Upminster to Sivas | 1,927.73 mi (3,102.37 km) |
| Upminster to Sivasli | 1,680.24 mi (2,704.09 km) |
| Upminster to Siverek | 2,110.70 mi (3,396.85 km) |
| Upminster to Sivrice | 2,080.13 mi (3,347.65 km) |
| Upminster to Sivrihisar | 1,711.93 mi (2,755.08 km) |
| Upminster to Sogut | 1,631.30 mi (2,625.33 km) |
| Upminster to Sogutlu | 1,605.94 mi (2,584.51 km) |
| Upminster to Soke | 1,625.18 mi (2,615.47 km) |
| Upminster to Solhan | 2,131.79 mi (3,430.78 km) |
| Upminster to Soma | 1,564.75 mi (2,518.22 km) |
| Upminster to Sorgun | 1,848.08 mi (2,974.20 km) |
